Comparison of measured and simulated motion of a scaled dragline excavation system

Motion measurements obtained from a maneuvering 1/16-scale dragline excavation system using a six camera motion capture system are compared against motion predictions of the same scenario using a complex dragline excavation system simulation. The dynamic model includes motion of the bucket, spreader bar, hoist cluster, and drag cluster, along with flexible rope and chain segments including the hoist rope, drag rope, dump rope, hoist chains, and drag chains. In general, measured and simulated motions agree quite favorably. However, a consistent difference between the measurements and the simulation model is damping of oscillations, where it is noticed that measurement data tend to damp more rapidly than simulation model results.